Problem is, second-year back Dion Lewis has been one of the surprise hits of camp, which means it would be extremely difficult to let him go too. And since there's probably only room for two more RBs on this roster behind starter LeSean McCoy, well, you do the math.

But Friday morning at the NovaCare Complex, offensive coordinator Marty Mornhinweg hinted at a solution, which could be to keep Polk, who clearly is the best and most physical blocker of the bunch, as the fullback.

"Certainly that’s been discussed and thought of,” said Mornhinweg said. "He is a physical player, isn’t he? I think Chris Polk is an excellent football player. I think he is an excellent ballcarrier. I think he could be an excellent blocker as well.

"... I do think he can [play fullback] because he’s such a physical man and such a physical player."

Of course, if the Eagles do go in that direction, it would mean bad news for Stanley Havili and the other fullback candidates, because it's doubtful the Eagles would keep more than one.

At the very least, Polk can give the Eagles what they're looking for from a fullback: selfless, alert blocking and dependable hands in the passing game. He's also capable of giving them quite a bit more.